I need suggestions on my pop back thru carb coming off idle with FOM in drive? MSD 8383 Dist with 12 degrees advance, ISKY E-2 cam at 17 degrees crankshaft advance, Fuel pressure not within Holley spec of 6-6 1/2 # I am at 3-4 # with mechanical pump. Fuel levels in site glass at idle are where they are suppose to be. Idle RPMS set a little high at 900 since this is a A/C car. I have taken all the slack out of carb pump arm. Motor does not diesel on shut down. The low speed set screws are responsive and set 1/2 turn out at 16 in. of vacuum. Engine in good condition as has fresh rebuild. Carb is excellent once off idle and at Hwy speeds. Holley Part # SL-450-VS.

56 VIC  Gene Stoehr Sr.